Blue-burner.



No 782,904. PATENTED FEB. 21, 1905.

Y L. FELLBERG & H. BOELLERT,

BLUE BURNER.

APPLICATION FILED APR. 20, 1904.

2 SHEETS-SEER! l.

No. 782,904. PATENTED FEB. 21, 1905. L. FELLBERG & H. BOELLERT,

BLUE BURNER.

APPLIUATION FILED APR. 20, 1904.

2 SHEETS-SHL:ET 2. 4

UNITED STATES Patented. February 21, 1905.

PATENT OFFICE.

LOUIS FELLBERG, OF BERLIN, AND HANS BOELLERT, OF RIXDORF, NEAR BERLIN, GERMANY;

SAID FELLBERG ASSIGNOR TO SAID BOELLER".

BLUE-BURNER- SPECIFIGATION forming part of Letters Patent No. 782,904, dated February 21, 1905. Application filed April 20, 1904. Serial No. 204,099.

To (tZZ whom, it may concern:

Be it known that we, LOUIS FnLLBnRe, a resident of 7 2 Beichenbergerstrasse, Berlin, and HANS BOELLERT, a resident of 146 Knese- 5 beckstrasse, Rixdorf, near Berlin, Germany,

subjects of the King of Prussia, Emperor of Germany, have jointly invented certain new and useful Improvements in Blue-Burners, of which the following is an exact specification.

Our invention relates to improvements in blue-burners for incandescent lighting or heating purposes, more especially to petroleum, spirit, or other liquid-fuel burners, and has for its purpose to provide a burner in which a sooting and an unequal burning of the flame is avoided by a suitable arrangement of the air-drafts for the flame and by the arrangement of means for heating the air streaming upward through the inner wick-tube.

In order to make our invention more clear, we refer to the accompanying drawings, in which Figure 1 is a vertical section of a burner constructed according to our invention. Fig.

2 is a plan of the principal parts of the burner. Fig. 3 is a vertical section of a modification of the construction shown in Fig. 1- Fig. 4 is a view of a detail part of this modification.

a is the outer wick-tube. 0 is the inner 3 wick-tube. Z) is they wick, situated between these tubes.

d is the burner-cap, which, asshown in the drawings, consists of a hollow cylindrical his a socket provided with an inwardly-projecting edge 0, which is directed downward. The socket Z: is situated around the outer wicktube a.

m is a ring fixed to the outer wick-tube. 4 The ring m is provided with a flange m, projecting sidewise. Between the ring m and the wick-tube a a channel a is formed.

The eifect of this device is as follows: By the air streaming upward through the inner wick-tube 0 the flame is extinguished at the inside of the wick. At the outside of the outer wick-tube the air-draft is throttled by means of the flange m of the ring on. By means of a flange directly fixed to the outer wick-tube the air-d raft on the outside of the wick would 5 be perfectly throttled; but by the perfect throttling of the air-draft an irregular burning would arise. In order to do away with this disadvantage, the small channel a is provided, which allows a small quantity of air to stream upward to the outside of the wick, which quantity of air is suflici ent for effecting a good combustion. The air-draft passing through thesmall channel n is, however, not sufficient for extinguishing the flame at the outside of the wick. The flange m is arranged about in the same height as the wick-tube opening at the upper outside edge of the ring in, so that the rising air is deflected from the burning wick end projecting over the upper 5 wick-tube opening and prevents too violent an air-current. This efiect would not be obtained if this tube-flange would be placed higher or lower. The channel a has the further advantage that the collecting of drops of 7 petroleum or the like, which always occurs in case the flange is directly fixed to the outer wick-tube, is avoided. The air streaming u pward through the inner wick-tube passes along the cylindrical burner-cap (Z, which on account of its great circumference effects a heating of this air, which is very advantageous for the combustion.

In the modification shown in Fig. 3 a socket s is rigidly fixed to the inner wick-tube c. The construction of this socket can be seen from Fig. 4. It will be seen from this figure that the socket is provided with an outwardlyprojecting flange a, which flange is so situated that in the burning position the upper sur- 5 face of the wick bears against this flange. It is further attained by this flange that the upper surface of the wick is always equal and is cleaned from the ashes and the residue of the combustion. At the upper part of the 9 socket s a ring if, provided with holes 0;, may be provided, which holes have the purpose of preventing the wick smoking after the flame is extinguished, thereby avoiding any smell.

In the drawings the invention is shown as applied to a burner for incandescent lighting; but it will be understood that the same may readily, equally, and as advantageously therefor be employed for heating purposes.

The burner-cap (Z is in this construction provided with a tube (Z, passing through the burner-cap, through which tube air streams upward and becomes heated during its passage therethrough.

Having thus fully described the nature of our invention, what we desire to secure by Letters Patent of the United States is- 1. In a blue-burner, the combination of the inner and outer wick-tube, with a ring situated around the outer wick-tube so as to leave a small channel between the outer wick-tube and this ring, an outwardly-projceting flange arranged at the upper end of this'ring, said flange being situated in the same height as the upper edge of the outer wick-tube and a burner-cap axially placed closely above the upper edge of the inner wick-tube, substantially as described and for the purpose set forth.

2. In a-blue-burner, the combination of the inner and outer wick-tube, with a ring situated around the outer wick-tube so asto leave a small channel between the outer wick-tube and this ring, an outwardly-projecting flange arranged at the upper end of this ring, said flange being situated in the same height as the upper edge of the outer wick-tube, and a burner-cap of substantially cylindrical shape, the diameter of this bu rner-cap being smaller than the diameter of the inner wick-tube, the lower surface of said burner-eap being situated closely above the upper edge of the inner wick-tube, substantially as described and for the purpose set forth.

3. In a blue-burner, the combination of the inner and outer wick-tube, with a ring situated around the outer wick-tube so as to leave a small channel between the outer wick-tube and this ring, an outwardly-projccting flange arranged at the upper end of this ring, said flange being situated in the same height as the upper edge of the outer wick-tube, a burnercap of substantially cylindrical shape, the diameter of this burner-cap being smaller than the diameter of the inner wick-tube, the lower surface of said burner cap being situated closely above the upper edge of the inner wicktube,and a tube passing vertically through the burner-cap, substantially as described and for the purpose set forth.

4:. In a blue-burner, the combination of the inner and outer wick-tube, with a ring situated around the outer wick-tube so as to leave a small channel between the outer wick-tube and this ring, an outwardly-projecting flange arranged at the upper end of this ring, said flange being situated in the same height as the upper edge of the outer wick-tube, a burnercap of substantially cylindrical shape, the diameter of this burner-cap being smaller than the diameter of the inner wick-tube, the lower surface of said burner cap being situated closely above the upper edge of the inner wicktube, a tube passing vertically through the burner-cap, and a socket fixed in the inner wick-tube, said socket being provided with an outwardly-projecting flange situated in the height in which the upper edge of the wick stands in its highest burning position, substantially as described and for the purpose set forth.

5. In a blue-burner, the combination of the inner and outer wick-tube, with a ring situated around the outer wick-tube so as to leave a small channel between the outer wick-tube and this ring, an outwardly-projecting flange arranged at the upper end of this ring, said flange being situated in the same height as the upper edge of the outer wick-tube, a burnercap of substantially cylindrical shape, the diameter of this burner cap being smaller than the diameter of the inner wick-tube, the lower surface of said burner cap being situated closely above the upper edge of the inner wicktube, a tube passing vertically through the burner-cap, and a socket fixed in the inner wick-tube, said socket being provided with an outwardly-projecting flange situated in the height, in which the upper edge of the wick stands in its highest burning position, and

LOUIS FELLBERG. HANS BOELLERT.

Vitnesses:

HENRY I-IAsPnR, \VOLDEMAR HAUPT. 

